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l = x
2 ( x + 2x ) = 54
x + 2x = 54/2
3x = 27
x = 9
p = 2 x 9 = 18 cm
l = x = 9 cm
L = p xl
L = 18 x 9
L = 162 cm²
k= 2(p+l)
54= 2(2l+l)
54/2=3l
27=3l
l= 9
maka p= 2l= 2 x 9= 18
L= p x l
= 18 x 9 = 162
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